Comparing Fractions and Equivalent Fractions
http://www.bbc.co.uk/skillswise/numbers/fractiondecimalpercentage/fractions/comparingfractions/game.shtml
http://www.gamequarium.com/fractions.html
http://illuminations.nctm.org/ActivityDetail.aspx?ID=18
http://illuminations.nctm.org/activitydetail.aspx?id=45
http://www.shodor.org/interactivate/activities/FractionFour/

Equivalent Fraction Matching
http://www.sheppardsoftware.com/mathgames/fractions/memory_equivalent1.htm

Comparing Fractions

http://www.sheppardsoftware.com/mathgames/fractions/Balloons_fractions1.htm

Reducing Fractions

http://www.sheppardsoftware.com/mathgames/fractions/reduce_fractions_shoot.htm

Fresh Baked Fractions

http://www.funbrain.com/fract/index.html